A window assembly (170) for a window opening of a motor vehicle comprises a door frame member (22), a movable window pane (130), a window sealing profile (100), and a guiding bracket (150). The movable window pane (130) includes a guiding section (136) and a window section (131) having an outer window surface (132). The window sealing profile (100) is fastened to the door frame member (22) and includes a sealing portion (110, 111, 112, 120) for sealing the window pane (130) against moisture and/or noise. The guiding bracket (150) includes a trimming surface (155) and is configured to guide the window pane (130) along a direction of movement between an open position and a closed position, and vice versa. The guiding bracket (150) simultaneously engages the window sealing profile (100) and the window pane (130), when in the fastened state.